Water flooded layer evaluation method based on rock pyrolysis gas chromatography technology

Abstract

The invention relates to the technical field of reservoir evaluation, in particular to a water-flooded layer evaluation method based on a rock pyrolysis gas chromatography technology, which comprises the following steps: taking peak areas corresponding to nC14-nC30 as sensitive parameters of water-flooded degree change, calculating the total peak area of a crude oil sample and the total peak area of a rock debris sample to be detected according to the sensitive parameters, and then calculating a water-flooded index; and based on a flooding index evaluation standard, identifying the reservoir flooding degree according to the flooding index. According to the method, the flooding index is compared with the flooding degree explained by oil testing, and a flooding index evaluation standard is established; for the reservoir with unknown flooding degree, after the flooding index is calculated, the reservoir flooding degree can be determined according to the flooding index evaluation standard. Meanwhile, the method avoids the defect that the flooding degree is qualitatively identified directly through the characteristics of the rock pyrolysis gas chromatography spectrogram, and has good use value and popularization prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of reservoir evaluation, and is a method for evaluating watered-out zones based on rock pyrolysis gas chromatography technology. It also includes a device, an electronic device, and a storage medium for evaluating watered-out zones based on rock pyrolysis gas chromatography technology. Background Art

[0002] During the process of oil extraction, with the continuous progress of water injection development, a large number of oil reservoirs show water flooding phenomena. The identification and evaluation of watered-out zones have become the key links in improving the oil recovery rate of reservoirs and optimizing subsequent exploitation plans.

[0003] Traditional methods for evaluating watered-out zones have many limitations. For example, when using resistivity logging to judge watered-out zones, when the formation water salinity changes or there are special lithologies, the accuracy of identifying watered-out zones will be greatly reduced, because the change law of formation resistivity after water flooding becomes complex and diverse, and it is no longer simply linearly related to the degree of water flooding.

[0004] Conventional gas chromatography analysis technology can provide certain information in the evaluation of watered-out zones. However, for complex oil and gas reservoirs, especially in the case of multi-stage hydrocarbon charging and mixed water flooding of multiple types, it is difficult to accurately analyze the subtle effects of different water flooding stages and different fluid properties on hydrocarbon components in rocks, resulting in large errors in evaluation results.

[0005] Rock pyrolysis gas chromatography technology can overcome some of the above defects. By performing pyrolysis gas chromatography analysis on rock samples, it can obtain rich information about hydrocarbon compounds in rocks, such as the content and distribution characteristics of hydrocarbons with different carbon numbers. These information are closely related to the water flooding status of the reservoir, because water flooding will cause the hydrocarbons in the rock pores to be washed out by water or undergo biodegradation and other changes, thus showing specific peak shapes, peak heights, and peak area ratios on the pyrolysis gas chromatography spectrum. However, at present, the method for evaluating watered-out zones based on rock pyrolysis gas chromatography technology has not yet formed a systematic, perfect, and widely applicable technical system, and further in-depth research and development are still needed to achieve more accurate and efficient evaluation of watered-out zones, providing reliable technical support and decision-making basis for oil exploration and development. With the vigorous development of watered-out zone reservoirs, the accurate identification of watered-out zones is becoming increasingly important, which requires more accurate and detailed means for evaluating watered-out zones.

[0006] The patent document with the publication number CN112858369A discloses a method for rapidly identifying favorable intervals of shale oil based on rock pyrolysis parameters, including: obtaining shale samples from a shale formation, conducting rock pyrolysis analysis and total organic carbon content determination respectively; obtaining the first organic geochemical parameters of the shale formation by using the rock pyrolysis analysis measurement method; determining the organic matter maturity and organic matter type of the shale sample according to the highest pyrolysis peak temperature and the chart of the highest pyrolysis peak temperature and hydrogen index; calculating the hydrocarbon expulsion amount; classifying the shale into three types, namely E type, M type and R type based on the hydrocarbon expulsion amount in the low-maturity to mature samples per unit mass; and determining the favorable intervals of the shale oil by combining the analysis and description of different types of shale. The present invention establishes a new index for characterizing the hydrocarbon expulsion amount of shale, realizes the prediction of shale oil-bearing property, and further clarifies the favorable intervals for shale oil exploration.

[0007] Zuo Tieqiu (Zuo Tieqiu et al., Method for evaluating water-flooded zones by rock pyrolysis analysis [J]. Mud Logging Engineering, 2005, Vol. 16, No. 3) obtained parameters such as the current remaining oil saturation and oil displacement efficiency through core pyrolysis analysis from the wellbore, finely evaluated the vertical water-flooded condition of the reservoir, comprehensively judged the water-flooded degree of the oil layer by calculating the water production rate of the reservoir, improved the adjustment and potential tapping efficiency of old oilfields, and provided a reliable basis for the further development of the technology for stabilizing oil production and controlling water cut and the deepening of fine geological research.

[0008] During the process of oil production, accurately judging the water-flooded condition of the reservoir is of crucial significance for predicting the remaining oil distribution, monitoring the reservoir dynamics, and improving the crude oil recovery rate. The present technology aims to provide effective technical means and solutions for this. Summary of the Invention

[0009] The present invention provides a method for evaluating water-flooded zones based on rock pyrolysis gas chromatography technology, which overcomes the deficiencies of the above-mentioned prior art. In the rock pyrolysis gas chromatography spectrum, the peak areas corresponding to nC 14 to nC 30 are used as sensitive parameters for the change of water-flooded degree, the water-flooding index is calculated, and the water-flooded degree of the reservoir is determined according to the water-flooding index.

[0010] The technical solution of the present invention is realized through the following measures: A method for evaluating water-flooded zones based on rock pyrolysis gas chromatography technology, including: Obtaining the rock pyrolysis gas chromatography spectrum and analysis data of a crude oil sample. In the rock pyrolysis gas chromatography spectrum of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Obtain the rock pyrolysis gas chromatography spectrum and analysis data of the cuttings sample to be measured that belongs to the same block as the crude oil sample. In the rock pyrolysis gas chromatography spectrum of the cuttings sample to be measured, nC 14 to nC 30 The corresponding peak area is the total peak area ∑ 测样 of the cuttings sample to be measured; Based on the total peak area ∑ 原油 of the crude oil sample and the total peak area ∑ 测样 of the cuttings sample to be measured, calculate the water flooding index; Based on the water flooding index evaluation standard, identify the water flooding degree of the reservoir according to the water flooding index.

[0011] The following is a further optimization and / or improvement of the above technical solution of the invention: The above water flooding index is calculated according to the following formula: In the formula, Q sy represents the water flooding index; ∑ 原油 represents the total peak area of the crude oil sample; ∑ 测样 represents the total peak area of the cuttings sample to be measured.

[0012] The total peak area ∑ 原油 of the above crude oil sample is calculated according to the following formula: In the formula, ∑ 原油 represents the total peak area of the crude oil; nC 30 represents the peak height of nC 30 n-alkane; nC 14 represents the peak height of nC 14 n-alkane; represents the peak heights of different n-alkanes.

[0013] The total peak area ∑ 测样 of the above cuttings sample to be measured is calculated according to the following formula: In the formula, ∑ 测样 represents the total peak area of the sample to be measured; nC 30 represents the peak height of nC 30 n-alkane; nC 14 represents the peak height of nC 14 n-alkane; represents the peak heights of different n-alkanes.

[0014] The above water flooding index evaluation standard is as follows: Not water flooded: Q sy ≥ -0.10; Weakly water flooded layer: -0.10 > Q sy ≥ -0.25; Weak-medium water flooded layer: -0.25 > Q sy ≥ -0.40; Medium water flooded layer: -0.40 > Q sy ≥ -0.55; Medium-strong water flooded layer: -0.55 > Q sy ≥ -0.70; Strong water flooded layer: -0.70 > Q sy > -0.90; Water layer: Q sy ≤ -0.90; Wherein, the Q sy represents the water flooding index.

[0015] The second technical solution of the present invention is achieved by the following measures: A water flooded layer evaluation device based on rock pyrolysis gas chromatography technology, comprising: Total peak area calculation module for crude oil: Obtain the rock pyrolysis gas chromatography spectrum and analysis data of the crude oil sample. In the rock pyrolysis gas chromatography spectrum of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Total peak area calculation module for cuttings: Obtain the rock pyrolysis gas chromatography spectrum and analysis data of the cuttings sample to be measured belonging to the same block as the crude oil sample. In the rock pyrolysis gas chromatography spectrum of the cuttings sample to be measured, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 测样 of the cuttings sample to be measured; Water flooding index calculation module: Calculate the water flooding index based on the total peak area ∑ 原油 of the crude oil sample and the total peak area ∑ 测样 of the cuttings sample to be measured; Water flooding degree identification module: Evaluate the water flooding degree of the reservoir based on the water flooding index evaluation standard according to the water flooding index.

[0016] The third technical solution of the present invention is achieved by the following measures: An electronic device, comprising a processor and a memory, wherein a computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the water flooded layer evaluation method based on rock pyrolysis gas chromatography technology as described in the first technical solution.

[0017] The fourth technical solution of the present invention is achieved by the following measures: A storage medium, on which a computer program readable by a computer is stored, and the computer program is set to execute the water flooded layer evaluation method based on rock pyrolysis gas chromatography technology as described in the first technical solution when running.

[0018] In the pyrolysis gas chromatography spectrum of the rock of the present invention, the peak areas corresponding to nC 14 to nC 30 are used as sensitive parameters for the change of water flooding degree, the water flooding index is calculated, and the water flooding index is compared with the water flooding degree interpreted by oil testing to establish a water flooding index evaluation standard; for a reservoir with unknown water flooding degree, after calculating the water flooding index and comparing it with the water flooding index evaluation standard, the water flooding degree of the reservoir can be determined. At the same time, this method also avoids the disadvantages of directly qualitatively identifying the water flooding degree through the characteristics of the pyrolysis gas chromatography spectrum of the rock, and has good application value and popularization prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 is a schematic flow chart of the present invention; Attached Figure 2 is an example of a pyrolysis gas chromatography spectrum of a rock; Attached Figure 3 is a broken line graph of the change of the pyrolysis gas chromatography spectrum of the rock of the experimental samples (Sample No. 1 to Sample No. 6) of the present invention; Attached Figure 4 is a broken line graph of the change of the pyrolysis gas chromatography spectrum of the rock in the application example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present invention and the actual situation. The percentages in the present invention are mass percentages unless otherwise specified.

[0021] The present invention will be further described below in conjunction with embodiments: Embodiment 1: The method for evaluating water flooded layers based on pyrolysis gas chromatography technology of rocks includes: Obtain the pyrolysis gas chromatography spectrum and analysis data of the rock of the crude oil sample. In the pyrolysis gas chromatography spectrum of the rock of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Obtain the pyrolysis gas chromatography spectrum and analysis data of the rock cuttings sample to be tested belonging to the same block as the crude oil sample. In the pyrolysis gas chromatography spectrum of the rock cuttings sample to be tested, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 测样 of the rock cuttings sample to be tested; Calculate the water flooding index based on the total peak area ∑ 原油 of the crude oil sample and the total peak area ∑ 测样 of the rock cuttings sample to be tested; Based on the water flooding index evaluation standard, the water flooding degree of the reservoir is identified according to the water flooding index.

[0022] An example of the pyrolysis gas chromatography spectrum of a certain rock is shown in Figure 2 .

[0023] The pyrolysis gas chromatography spectra and analysis data of the crude oil sample and the rock cuttings sample to be measured are obtained by pyrolysis gas chromatography analysis of the rock respectively.

[0024] Example 2: As an optimization of the above example, the water flooding index is calculated according to the following formula: In the formula, Q sy represents the water flooding index; ∑ 原油 represents the total peak area of the crude oil sample; ∑ 测样 represents the total peak area of the rock cuttings sample to be measured.

[0025] The total peak area ∑ 原油 of the above crude oil sample is calculated according to the following formula: In the formula, ∑ 原油 represents the total peak area of the crude oil; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

[0026] Example 3: As an optimization of the above example, the total peak area ∑ 测样 of the rock cuttings sample to be measured is calculated according to the following formula: In the formula, ∑ 测样 represents the total peak area of the sample to be measured; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

[0027] Example 4: As an optimization of the above example, the water flooding index evaluation standard (see Table 1) is as follows: Not water flooded: Q sy ≥ -0.10; Weakly water flooded layer: -0.10 > Q sy ≥ -0.25; Weak - moderately water flooded layer: -0.25 > Q sy ≥ -0.40; Moderately water flooded layer: -0.40 > Qsy ≥ -0.55; Medium - strong water - flooded layer: -0.55 > Q sy ≥ -0.70; Strong water - flooded layer: -0.70 > Q sy > -0.90; Water layer: Q sy ≤ -0.90; Wherein, the Q sy represents the water - flooding index.

[0028] Example 5: An evaluation device for water - flooded layers based on rock pyrolysis gas chromatography technology, comprising: Total peak area calculation module for crude oil: Obtain the rock pyrolysis gas chromatography spectrum and analysis data of the crude oil sample. In the rock pyrolysis gas chromatography spectrum of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Total peak area calculation module for cuttings: Obtain the rock pyrolysis gas chromatography spectrum and analysis data of the cuttings sample to be measured belonging to the same block as the crude oil sample. In the rock pyrolysis gas chromatography spectrum of the cuttings sample to be measured, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 测样 of the cuttings sample to be measured; Water - flooding index calculation module: Calculate the water - flooding index based on the total peak area ∑ 原油 of the crude oil sample and the total peak area ∑ 测样 of the cuttings sample to be measured; Water - flooding degree identification module: Evaluate the water - flooding degree of the reservoir based on the water - flooding index evaluation standard according to the water - flooding index.

[0029] Example 6: An electronic device, comprising a processor and a memory. A computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the method for evaluating water - flooded layers based on rock pyrolysis gas chromatography technology as described in the above example.

[0030] Example 7: A storage medium, on which a computer program readable by a computer is stored, and the computer program is set to execute the method for evaluating water - flooded layers based on rock pyrolysis gas chromatography technology as described in the above example when running.

[0031] In the present invention, as Figure 1 shown, the extraction of sensitive parameters includes the following steps: Step 1: Sample preparation a. Select an experimental core sample with a porosity of 20%, and use a coring tool to drill a cylindrical sample with a diameter of 2.54 cm and a length of 12 cm; b. Immerse the drilled cylindrical sample in the organic solvent chloroform to dissolve the organic oil in the core sample, and then use a drying oven to dry it at a temperature of 110 °C for no less than 24 h; c. Cut the dried cylindrical sample into cylindrical samples with a diameter of 2.54 cm and a length of 2 cm, and mark the numbers as Sample No. 1, No. 2, No. 3, No. 4, No. 5, and No. 6; d. Inject the samples with crude oil, and the treatment method is as follows: (1) Inject 100% crude oil into Sample No. 1; (2) Inject 80% crude oil + 20% aqueous solution into Sample No. 2; (3) Inject 60% crude oil + 40% aqueous solution into Sample No. 3; (4) Inject 50% crude oil + 50% aqueous solution into Sample No. 4; (5) Inject 40% crude oil + 60% aqueous solution into Sample No. 5; (6) Inject 20% crude oil + 80% aqueous solution into Sample No. 6; The density of the injected crude oil is 0.85 g / cm 3 , and the salinity of the aqueous solution is 15000 mg / L.

[0032] Step 2: Analysis of the samples after injection treatment a. Select Sample No. 1 for rock pyrolysis gas chromatography analysis (starting temperature 100 °C, constant temperature for 1 min, then increasing the temperature at a rate of 8 °C / min until the column oven temperature reaches 300 °C, and then maintaining a constant temperature for 15 min) to obtain the rock pyrolysis gas chromatography spectrum and data points of Sample No. 1; b. Samples No. 2 to No. 6 are operated according to Step 2a to obtain the rock pyrolysis gas chromatography spectra and data points of Samples No. 2 to No. 6; The change line graph of the rock pyrolysis gas chromatography spectra of Samples No. 1 to No. 6 is shown in Figure 3 .

[0033] Step 3: Spectrum analysis a. The spectrum peak of Sample No. 1 is full, and the carbon number range is from nC 12 to nC 36 . As the proportion of the injected crude oil and aqueous solution changes, the spectrum peak changes; b. For Samples No. 2 to No. 6, as the injected crude oil gradually decreases and the aqueous solution increases, the spectrum peak tends to be mountain-shaped and front-peak-shaped, and the carbon number range shrinks, with Sample No. 6 showing the most significant shrinkage; c. Determine the carbon number range from nC 14 to nC30 The peak area change in the

[0034] Step Four: Extract sensitive parameters The peak area of the rock pyrolysis gas chromatography is obtained by accumulating the contents of different normal alkanes to get the final peak area. Since in Step Three c, the carbon number range is from nC 14 to nC 30 The peak area change in the 14 to nC 30 region is the most obvious. Therefore, the peak area corresponding to nC

[0035] Step Five: Calculate the total peak area Sample No. 1 is 100% crude oil (referred to as crude oil for short). The total peak area of Sample No. 1 is calculated as follows: In the formula, ∑ 原油 represents the total peak area of the crude oil; nC 30 represents nC 30 the peak height of the normal alkane; nC 14 represents nC 14 the peak height of the normal alkane; represents the peak heights of different normal alkanes.

[0036] The total peak areas of Samples No. 2 to No. 6 are all calculated as follows: In the formula, ∑ 测样 represents the total peak area of the sample to be measured; nC 30 represents nC 30 the peak height of the normal alkane; nC 14 represents nC 14 the peak height of the normal alkane; represents the peak heights of different normal alkanes.

[0037] Establishment of the water flooding index evaluation standard: Calculate the water flooding index using multiple crude oil samples and multiple cuttings samples from the same block, and compare the water flooding index with the water flooding degree interpreted by well testing to establish the water flooding index evaluation standard.

[0038] Application example: Apply the water flooded layer evaluation method based on rock pyrolysis gas chromatography technology of the present invention to Block Bai 21 of Xinjiang Oilfield, including the following steps: (1) Selection of regional crude oil samples Select the crude oil samples in the Karamay Formation (T2 k ) of Block Bai 21 for rock pyrolysis gas chromatography spectrum analysis. The density of the selected crude oil samples is 0.86 g / cm 3 .

[0039] The selected crude oil samples are operated according to steps a and b of step one and step a of step two to obtain the corresponding pyrolysis gas chromatography spectra and analysis data of the rock.

[0040] (2) Determine the total peak area of the crude oil sample According to the total peak area ∑ 原油 of the crude oil sample, determine the total peak area ∑ 原油 of the crude oil sample: In the formula, ∑ 原油 represents the total peak area of the crude oil; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

[0041] After calculation, it is obtained that: (3) Select the sample to be measured Select the cuttings samples taken while drilling from Well BX1 in the Karamay Formation in Block Bai 21 as the cuttings samples to be measured, and select three sections (section 1: 2506.00 m to 2508.00 m, section 2: 2672.00 m to 2674.00 m, section 3: 2760 m to 2762.00 m) of the cuttings samples taken while drilling respectively.

[0042] The selected cuttings samples taken while drilling are operated according to step a of step two to obtain the corresponding pyrolysis gas chromatography spectra and analysis data of the rock.

[0043] The pyrolysis gas chromatography spectra change line charts formed by analyzing the crude oil samples after pyrolysis in the pyrolysis furnace and the cuttings samples taken while drilling from three sections of Well BX1 are shown in Figure 4 .

[0044] (4) Total peak area of the sample to be measured Calculate the total peak area ∑ 测样 (Table 2) of the cuttings samples taken while drilling respectively according to the following formula.

[0045] In the formula, ∑ 测样 represents the total peak area of the sample to be measured; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

[0046] (5)Calculation of water flooding index Calculate the water flooding index of the cuttings samples while drilling according to the following formula, and evaluate the degree of water flooding (Table 3).

[0047] The formula for calculating the water flooding index is as follows: (6)Verification of oil testing conclusion Verify the oil testing conclusions for the three tested intervals of Well BX1. From 2506.00m to 2508.00m, the daily oil production is 4.5t, the water cut is 14.5%, and it is a weakly water flooded layer; from 2672.00m to 2674.00m, the daily oil production is 3.7t, the water cut is 45.0%, and it is a moderately water flooded layer; from 2760m to 2762.00m, the daily oil production is 0.05t, the water cut is 97.5%, and it is a water layer.

[0048] The oil testing conclusions are consistent with the degree of water flooding evaluated by the water flooding index in Table 3.

[0049] In summary, the water flooded layer evaluation method based on rock pyrolysis gas chromatography technology formed by the present invention realizes the quantification of the water flooding degree evaluation, and provides important data support for the subsequent mud logging and oil testing layer selection suggestions and interpretation conclusions.

[0050] The method of the present invention provides a quantitative evaluation means for water flooded reservoirs in the Xinjiang Oilfield. In practical applications, the water flooding index is used to evaluate the degree of water flooding, and it is verified by the oil testing conclusions. The coincidence rate of water flooding degree identification reaches more than 90%, effectively improving the accurate identification of water flooded layers.

[0051] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effects. Non-essential technical features can be added or subtracted according to actual needs to meet the requirements of different situations.

[0052] Table 1 Water flooding index evaluation criteria .

[0053] Table 2 Total peak area of the cuttings samples to be measured .

[0054] Table 3 Evaluation table of water flooding index and water flooding degree for the measured intervals .

Claims

1. A method for evaluating water - flooded layers based on rock pyrolysis gas chromatography technology, characterized in that, Including: Obtain the pyrolysis gas chromatography spectrum and analysis data of the crude oil sample. In the pyrolysis gas chromatography spectrum of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Obtain the pyrolysis gas chromatography spectrum and analysis data of the rock cuttings sample to be tested that belongs to the same block as the crude oil sample. In the pyrolysis gas chromatography spectrum of the rock cuttings sample to be tested, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 测样 of the rock cuttings sample to be tested; Based on the total peak area ∑ of the crude oil sample 原油 and the total peak area ∑ of the cuttings sample to be measured 测样 calculate the water flooding index; Based on the water flooding index evaluation criteria, identify the water flooding degree of the reservoir according to the water flooding index.

2. The evaluation method for water-flooded zones based on rock pyrolysis gas chromatography technology according to claim 1, wherein The water flooding index is calculated by the following formula: Where Q sy represents the water flooding index; ∑ 原油 represents the total peak area of the crude oil sample; ∑ 测样 represents the total peak area of the cuttings sample to be measured.

3. The watered-out zone evaluation method based on the rock pyrolysis gas chromatography technology according to claim 2, characterized in that The total peak area ∑ of the crude oil sample 原油 is calculated according to the following formula: Wherein, ∑ 原油 represents the total peak area of crude oil; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

4. The evaluation method for water-flooded zones based on rock pyrolysis gas chromatography technology according to claim 2 or 3, characterized in that Total peak area ∑ of the cuttings sample to be measured 测样 Calculate according to the following formula: Where, ∑ 测样 represents the total peak area of the sample to be measured; nC 30 represents the peak height of nC 30 normal paraffin; nC 14 represents the peak height of nC 14 normal paraffin; represents the peak heights of different normal paraffins.

5. The evaluation method for watered-out zones based on rock pyrolysis gas chromatography technology according to claim 1 or 2, characterized in that The water flooding index evaluation criteria are as follows: Not flooded: Q sy ≥ -0.10; Weak flooding layer: -0.10>Q sy ≥-0.25; Weak-medium water-flooded layer: -0.25 > Q sy ≥ -0.40; Water-flooded layer: -0.40 > Q sy ≥ -0.55; Medium-strong water flooded layer: -0.55 > Q sy ≥ -0.70; Strong water flooded layer: -0.70 > Q sy > -0.90; Water layer: Q sy ≤ -0.90; Among them, the Q sy represents the water flooding index.

6. The evaluation method for water-flooded layers based on rock pyrolysis gas chromatography technology according to claim 3, characterized in that, The water flooding index evaluation criteria are as follows: Not flooded: Q sy ≥ -0.10; Weak flooding layer: -0.10>Q sy ≥-0.25; Weak-medium water flooded layer: -0.25 > Q sy ≥ -0.40; Water-flooded layer: -0.40 > Q sy ≥ -0.55; Medium-strong water flooded layer: -0.55 > Q sy ≥ -0.70; Strong water flooded layer: -0.70 > Q sy > -0.90; Water layer: Q sy ≤ -0.90; Among them, the Q sy represents the waterlogging index.

7. The evaluation method for watered-out zones based on rock pyrolysis gas chromatography technology according to claim 4, characterized in that, The water flooding index evaluation criteria are as follows: Not flooded: Q sy ≥ -0.10; Weak water flooded layer: -0.10 > Q sy ≥ -0.25; Weak-medium water-flooded layer: -0.25 > Q sy ≥ -0.40; Water-flooded layer: -0.40 > Q sy ≥ -0.55; Medium-strong water flooded layer: -0.55 > Q sy ≥ -0.70; Strongly watered-out layer: -0.70 > Q sy > -0.90; Water layer: Q sy ≤ -0.90; Among them, the Q sy represents the water flooding index.

8. An evaluation device for water-flooded layers based on rock pyrolysis gas chromatography technology, characterized in that, Including: Total peak area calculation module for crude oil: Obtain the pyrolysis gas chromatography spectrum and analysis data of the crude oil sample. In the pyrolysis gas chromatography spectrum of the crude oil sample, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 原油 of the crude oil sample; Total peak area calculation module of cuttings: Obtain the pyrolysis gas chromatography spectrum and analysis data of the cuttings sample to be tested belonging to the same block as the crude oil sample. In the pyrolysis gas chromatography spectrum of the cuttings sample to be tested, the peak areas corresponding to nC 14 to nC 30 are the total peak area ∑ 测样 of the cuttings sample to be tested; Water flooding index calculation module: Based on the total peak area ∑ of the crude oil sample 原油 and the total peak area ∑ of the cuttings sample to be measured 测样 calculate the water flooding index; Water flooding degree identification module: Based on the water flooding index evaluation criteria, identify the water flooding degree of the reservoir according to the water flooding index.

9. An electronic device, characterized in that, Including a processor and a memory, a computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the water flooded layer evaluation method based on the rock pyrolysis gas chromatography technology as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, A computer program readable by a computer is stored on the storage medium, and the computer program is set to execute the water flooded layer evaluation method based on the rock pyrolysis gas chromatography technology as described in any one of claims 1 to 7 when running.

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